It's not hard to see how Christianity became the religion of slave holders, but confounding that it became the religion of slaves as well. I see this in black communities here in the US Southeast, and among Native Americans where they survive across the continent. Those who have been oppressed embrace the values imposed upon them by their oppressors. The only reason that I can come up with is that Christianity includes a built-in escape clause -- whatever tribulations are encountered in this life will be reversed and rewarded in the next. This is the sort of 'thinking' that flies airplanes into buildings.